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Siemens SIWAREX WP251 Manual Download Page 193

 

Communication with SIMATIC S7-1200 

 

11.2 Communication via Modbus 

SIWAREX WP251 
Manual, 12/2015, A5E37203357A 

193

 

 

 

Note 
If execution of the function block is faulty, the variables shown do not correspond to the 

actual status in the module. 

 

11.2

 

Communication via Modbus 

11.2.1

 

Introduction 

The current process values and parameters can be exchanged via the RS485 interface with 

Modbus RTU or the Ethernet interface with Modbus TCP/IP. It is possible to use both 

interfaces for the communication. 

 

 

Note 
The SIWAREX WP251 is intended for operation in secure (closed) networks and does not 

have any protection against unauthorized data traffic. 

 

The following chapters describe the specifications for handling communication. The following 

functions can be executed: 

●

 

Export parameters from the electronic weighing system 

●

 

Write parameters 

●

 

Export current process values 

●

 

Monitor messages 

11.2.2

 

Principle of data transmission 

This description is valid for communication via Modbus RTU and Modbus TCP/IP.  
The standardized MODBUS protocol is used for communication. The master function is 

always in the connected communication partner, while the SIWAREX module is always the 

slave. 
Data transfer is bidirectional. The master function is always in the connected module which 

“controls” the communication with corresponding requests to the respective SIWAREX 

module address. The SIWAREX module is always the slave and responds to the requests of 

the master, provided that the address matches, with a response frame. 
Each Modbus partner has its own address. The SIWAREX module has the default address 

1. This address can be changed as a parameter (e.g. in SIWATOOL). This address is 

without significance if the Ethernet interface is used because the connection is based on the 

IP address. 

Summary of Contents for SIWAREX WP251

Page 1: ..._____________ ___________________ ___________________ Weighing systems Electronic Weighing System SIWAREX WP251 Manual 12 2015 A5E37203357A Introduction 1 Safety notes 2 Description 3 Application planning 4 Mounting 5 Connection 6 Commissioning 7 Scale parameters and functions 8 Errors and messages 9 Command lists 10 Communication with SIMATIC S7 1200 11 Operation requiring official calibration 12...

Page 2: ...ay be operated only by personnel qualified for the specific task in accordance with the relevant documentation in particular its warning notices and safety instructions Qualified personnel are those who based on their training and experience are capable of identifying risks and avoiding potential hazards when working with these products systems Proper use of Siemens products Note the following WAR...

Page 3: ...ning 21 4 1 Functions 21 4 2 Parameter assignment options 21 4 2 1 Parameter assignment with the PC 21 4 2 2 Parameter assignment with a SIMATIC Panel 22 4 2 3 Parameter assignment by means of the Modbus interface 23 5 Mounting 25 5 1 Installation guideline 25 5 2 EMC compliant installation 25 5 2 1 Introduction 25 5 2 2 Possible effects of interference 25 5 2 3 Coupling mechanisms 26 5 2 4 Five b...

Page 4: ...alibration with calibration weights and SIWATOOL 46 7 4 1 Introduction 46 7 4 2 Activate service mode 46 7 4 3 Load standard parameters 46 7 4 4 Input of required parameters 46 7 4 5 Calibration 47 7 4 6 Receive all data 48 7 4 7 Checking the scale following calibration 48 7 5 Service with the SIWATOOL program 48 7 5 1 General 48 7 5 2 Windows and functions of SIWATOOL 49 7 5 3 Offline parameter a...

Page 5: ...ative zero setting limit power on 70 8 3 18 Maximum positive zero setting limit power on 70 8 3 19 Maximum negative zero setting limit semi automatically 70 8 3 20 Maximum positive zero setting limit semi automatically 71 8 3 21 Standstill monitoring 71 8 3 22 Standstill 1 range 72 8 3 23 Standstill 1 time 72 8 3 24 Max waiting time for standstill 1 72 8 3 25 Standstill 2 range 73 8 3 26 Standstil...

Page 6: ...8 8 Analog output source 93 8 8 9 Response of analog output to faults or SIMATIC STOP 93 8 8 10 Start value for the analog output 93 8 8 11 End value for the analog output 93 8 8 12 Output value following fault or SIMATIC STOP 94 8 8 13 Trace recording cycle 94 8 8 14 Trace storage method 94 8 9 DR 8 date and time 95 8 10 DR 9 module information 95 8 11 DR 10 Load cell parameters 96 8 11 1 Overvie...

Page 7: ...1 1 Overview 111 8 21 2 Parameter relation 115 8 21 3 Tolerance limit TH2 116 8 21 4 Tolerance limit TH1 116 8 21 5 Tolerance limit TL1 116 8 21 6 Tolerance limit TL2 116 8 21 7 Behavior in case of TH1 error 116 8 21 8 Behavior in case of TL1 error 116 8 21 9 Pulse duration for pulse post dosing 116 8 21 10 Number of not controlled weighings 117 8 21 11 Capture of weighings into statistics 117 8 2...

Page 8: ...4 14 Maximum emptying time 131 8 25 DR 28 Additional strings for log 132 8 25 1 Overview 132 8 25 2 Strings 1 2 3 and 4 132 8 25 3 Sting selection for automatic logging 133 8 26 DR 29 Configuration of technology messages 133 8 27 DR 30 Process state 135 8 27 1 Overview 135 8 27 2 Gross net and tare process values 140 8 27 3 Gross net and tare weights 140 8 27 4 Gross Net weight x10 140 8 27 5 Gros...

Page 9: ...rotocol content 157 8 36 1 Overview 157 8 36 2 Oldest report ID 158 8 36 3 Newest report ID 158 8 36 4 Selected protocol ID 158 8 36 5 Protocol 158 8 36 6 Date time 159 8 37 DR 47 Logbook 159 8 38 DR 48 date and time 2 for Modbus 160 9 Errors and messages 163 9 1 Message and error types 163 9 2 Message paths 163 9 3 Evaluating errors messages with the help of SIWATOOL 164 9 4 Evaluating errors mes...

Page 10: ...ring for calibration 197 12 1 1 Calibration set 197 12 1 2 Scale design 197 12 1 3 Installation and parameter assignment of the calibratable SecureDisplay main display in the HMI 197 12 1 4 Parameterization of the scale 198 12 1 5 Adjustment and preliminary checking of the scale 198 12 1 6 Calibration label 198 12 2 Verification 198 12 2 1 Checking of parameters relevant to the verification 198 12...

Page 11: ...ta record 12 98 Table 8 12 Assignment of data record 13 100 Table 8 13 Selection table for process value 1 2 103 Table 8 14 Structure of status of analog output digital outputs and digital inputs 104 Table 8 15 Assignment of data record 15 104 Table 8 16 Assignment of data record 16 105 Table 8 17 Assignment of data record 17 106 Table 8 18 Assignment of data record 18 107 Table 8 19 Assignment of...

Page 12: ...tion block 192 Table 11 3 Command mailbox 1 Highest priority 195 Table 11 4 Command mailbox 2 Average priority 195 Table 11 5 Command mailbox 3 Low priority 195 Table 13 1 Technical specifications 24 V power supply 203 Table 13 2 Technical specifications Power supply from SIMATIC S7 backplane bus 203 Table 13 3 Technical specifications Analog load cell interface connection 203 Table 13 4 Technical...

Page 13: ...witch 41 Image 7 2 Quick calibration with marked parameters 43 Image 7 3 Sending receiving a data record in SIWATOOL V7 44 Image 7 4 Sending receiving a data record in SIWATOOL V7 47 Image 7 5 Layout of the SIWATOOL user interface 49 Image 7 6 Sending receiving a data record in SIWATOOL V7 50 Image 7 7 Trace export 53 Image 7 8 Downloading the firmware with SIWATOOL 55 Image 8 1 Standstill monitor...

Page 14: ...12 2015 A5E37203357A Image 11 6 CMD command mailboxes 189 Image 11 7 s_IO_DATA 191 Image 13 1 Current ranges for signal level according to Namur recommendation NE43 205 Image A 1 Electrostatic voltages which an operator can be subjected to 216 ...

Page 15: ...SIMATIC S7 1200 automation system and the TIA Portal are required 1 3 Manual range of validity This manual is valid for Type designation Order No as of version SIWAREX WP251 7MH4960 6AA01 HW FS 3 FW V 1 0 0 Note This manual contains a description of all electronic weighing systems available at the date of publication We reserve the right to include a Product Information with the latest information...

Page 16: ...on FAQs downloads tips and tricks Our newsletter providing you with the latest information about your products A Knowledge Manager to find the right documents for you Our bulletin board where users and specialists share their knowledge worldwide You can find your local contact partner for Industry Automation and Drives Technologies in our partner database Information about field service repairs sp...

Page 17: ...for operation of the SIWAREX WP251 The safety notes must be observed Note The device was developed manufactured tested and documented in compliance with the relevant safety standards The device does usually not pose any risks of material damage or personal injury 2 2 Security messages Siemens provides automation and drive products with industrial security functions that support the secure operatio...

Page 18: ...rity messages SIWAREX WP251 18 Manual 12 2015 A5E37203357A machine Products used from other manufacturers should also be taken into account here You will find further information under http www siemens de industrialsecurity ...

Page 19: ...s of SIWAREX WP251 are Automatic catchweighing instruments Gravimetric filling instruments AWI Non automatic weighing instrument NAWI Weighing instruments in hazardous areas with Ex interface SIWAREX IS 3 3 System integration in SIMATIC The electronic weighing system described here is a technology module for SIMATIC S7 1200 The system including the weighing application can be configured as desired...

Page 20: ...w 3 4 Scope of delivery The product package consists only of the SIWAREX WP251 weighing module Note We recommend that you use the SIWAREX WP251 configuration package for configuring the SIWAREX WP251 electronic weighing system The configuration package is not included in the product package of the module ...

Page 21: ...WIFI access point is used Remote access via the Internet is also possible problem free Centralized access to all scales from a single location is possible for servicing purposes worldwide In addition there is full access to all parameters and commands both via the RS485 port Modbus RTU and via the Ethernet interface Modbus TCP IP meaning that full commissioning and operation can also take place vi...

Page 22: ...e memory The internal log memory can also be conveniently and easily read in csv format using SIWATOOL In addition the tool can be used to create backup files which can be re imported into a new module after module replacement in just a few a seconds without the need for any knowledge of the CPU program or automation environment SIWATOOL uses its own communication protocol meaning that a connectio...

Page 23: ... interface You have the option to assign the parameters with a SIMATIC panel which is connected directly to the SIWAREX module The SIWAREX module behaves like a Modbus slave in this case Loadable HMI software for a SIMATIC Panel TP700 Comfort is provided in the scope of delivery of the configuration package All SIMATIC HMI Comfort Panels can be used for direct Modbus communication The use of SIMAT...

Page 24: ...lanning 4 2 Parameter assignment options SIWAREX WP251 24 Manual 12 2015 A5E37203357A A detailed description of the assignment of the holding registers can be found in section Scale parameters and functions Page 57 ...

Page 25: ...ss before installing your devices you should prepare an EMC plan and identify and take into consideration possible interference sources EMC EMC electromagnetic compatibility describes the capability of electrical equipment to operate without errors in a given electromagnetic environment without being subject to external influence and without influencing external devices in any way 5 2 2 Possible e...

Page 26: ...ized metal parts support contact with special contact washers or remove the protective insulating finish on the points of contact Wherever possible avoid the use of aluminum parts for ground bonding Aluminum oxidizes very easily and is therefore less suitable for ground bonding Provide a central connection between chassis ground and the ground protective conductor system Rule 2 Proper cable routin...

Page 27: ...ential differences exist or are expected between your system components Equipotential bonding is absolutely mandatory for applications in hazardous areas 5 3 Mounting on the SIMATIC S7 1200 The electronic weighing system described here is a SIMATIC S7 1200 module and can be directly connected to the automation system s bus system The 70 mm wide module has very low installation and cabling requirem...

Page 28: ...Mounting 5 3 Mounting on the SIMATIC S7 1200 SIWAREX WP251 28 Manual 12 2015 A5E37203357A ...

Page 29: ...by means of the screw connectors terminal block 1 to 4 24 V connection Digital input connection Analog output connection Ethernet interface connection Load cell connection Calibration bridge connection RS485 interface connection Mounting terminals for the calibration protection plate Digital output connection Image 6 1 SIWAREX WP251 connection areas ...

Page 30: ...ing condition must be met Scale operation without Ex interface input resistance of load cell number of load cells 40 Ohm Scale operation without Ex interface input resistance of load cell number of load cells 50 Ohm Rules Observe the following rules when connecting analog strain gauge load cells 1 The use of a junction box SIWAREX JB junction box is required when more than one load cell is connect...

Page 31: ...g Measurement cable load cell Sig Measurement cable load cell Sen Sensor cable load cell Sen Sensor cable load cell Exc Supply load cell Exc Supply load cell 6 4 Shield connection Make sure you observe the correct design of the shield support for the shielded cables It is the only way to ensure immunity of the system A cable is shielded to attenuate the effects of magnetic electrical and electroma...

Page 32: ...Connection 6 4 Shield connection SIWAREX WP251 32 Manual 12 2015 A5E37203357A Image 6 3 Installation of the shield connection element example ...

Page 33: ...Connection 6 4 Shield connection SIWAREX WP251 Manual 12 2015 A5E37203357A 33 Image 6 4 Connection of strain gauge load cell with 4 wire system ...

Page 34: ...ection of digital outputs 4 x DQ CAUTION Unknown assignment of digital outputs The assignment of the digital outputs is not known at the time of connection Digital outputs can be active immediately after turning on the power supply This may damage parts of the system Do not create a connection with the digital outputs before you know the assignment of the digital outputs ...

Page 35: ...und of power supply for digital outputs 6 6 Connection of digital inputs 4 x DI CAUTION Unknown assignment of digital inputs If the assignment of the digital inputs is not known at the time of connection this may damage parts of the system Do not create a connection with the digital inputs before you know the assignment The electronic weighing system described here has four isolated digital inputs...

Page 36: ...20 mA or 4 20 mA output Table 6 5 Connection of analog output Labeling Function AQ Analog output AQ Analog output 6 8 Connection of RS485 serial interface The following devices can be connected to the serial interface Siebert display type S102 connections see chapter Connection of Siebert display via RS485 Page 37 Operator Panels or other HMI devices with RS485 and Modbus protocol RTU Communicatio...

Page 37: ...the following diagram Image 6 6 Connection of Siebert display S102 The RS485 interface in DR 13 of the SIWAREX WP251 is set as follows Baud rate 9 600 bit s Character parity Even Number of data bits 8 Number of stop bits 1 The S102 is set as follows Table 6 7 Settings of Siebert display S102 Menu item Setting Meaning 1 Interface 485 RS485 interface 9 Station address 01 Address meaning Address Weig...

Page 38: ...devices with Ethernet and Modbus protocol TCP IP 6 11 Activation of write protection If a wire jumper is set between the module terminals P and PR the parameter write protection will be activated With a few exceptions when write protection is active the parameters from data record 3 can no longer be edited and various service and calibration commands can no longer be executed Table 6 8 Activation ...

Page 39: ...s a calibratable electronic weighing system the load cell connections must be protected against manipulation To achieve this mount the calibration protection plate included in the calibration set as shown in the following figure Then attach the calibration protection plate to the associated terminals see Overview Page 29 Image 6 7 Attachment of the calibration protection plates ...

Page 40: ...Connection 6 12 Attachment of calibration protection plate SIWAREX WP251 40 Manual 12 2015 A5E37203357A ...

Page 41: ...the WP251 configuration package see Accessories The function block and the Ready for use example application can be downloaded for free from Siemens Online Support 7 2 Factory setting of the mode selector The module contains two DIP switches to the left of the Ethernet connector accessible through the ventilation opening Both switches are at the top position ex factory Image 7 1 Mode switch The le...

Page 42: ...le is in operation with SIMATIC the SIWAREX module will not carry out a reset upon loss of power supply to the SIMATIC CPU 7 3 Automatic quick calibration with SIWATOOL 7 3 1 Overview General information on using the SIWATOOL V7 program can be found in section Service with the SIWATOOL program Page 48 In order to perform the automatic quick calibration the parameters marked in bold font in data re...

Page 43: ...find the command in the Service Commands group spanner icon 7 3 3 Load standard parameters The quick setup is based on the standard settings of the weighing module Therefore the standard parameter settings must be reset prior to the quick setup Firstly service mode is activated the standard parameters are subsequently loaded using the Load standard parameters 12 command The parameters must then be...

Page 44: ... not possible to read or write individual parameters within a data record Therefore the complete data record must initially be received for every change to parameters within it The desired parameter can then be edited and the data record returned If the data record is not received the danger exists that different offline parameters will be sent to the scale and overwrite previously active and inte...

Page 45: ... saved as a backup file on the hard disk If a module is replaced the backup file can be downloaded to the new module within a few seconds At the time of input of the backup file the scale is directly in the calibrated state again without a new calibration 7 3 7 Checking the scale after calibration Perform the following steps 1 Scale is unloaded and shows 0 kg 2 Place a known reference weight on th...

Page 46: ...sing Communication Receive all data 7 4 4 Input of required parameters For commissioning you must enter the following parameters in data record DR 3 and send these to the module Unit of weight Required maximum weighing range of the scale Scale interval Calibration weight 0 1 and optionally 2 The description of the parameters can be obtained from the description of data record DR 3 Sending receivin...

Page 47: ... in mV V or the mean value of the characteristic values if there is more than one load cell Rated load of a load cell Load cell manufacturer The manufacturer of the installed load cells can be quickly and easily identified in a service case Load cell order number The order number of the installed load cells can be quickly and easily identified in a service case 7 4 5 Calibration Provided that the ...

Page 48: ... following calibration Perform the following steps 1 The scale is unloaded and shows 0 kg 2 Place a known reference weight on the scale Check the displayed value 3 If a second known reference weight is available place it on the scale additionally Check whether the scale displays the sum of the reference weights 4 Remove the reference weight from the scale Check that the display is 0 kg again 7 5 S...

Page 49: ...ucture For example if data record 3 is to be sent right click on Calibration parameter DR3 A submenu is then opened with the option to send the respective data record to the weighing module or read it from the module All data records can only be sent to or read from the SIWAREX as complete packets It is not possible to read or write individual parameters within a data record Therefore the complete...

Page 50: ...is address is also preset in SIWATOOL The connection to a SIWAREX module can be established immediately The network card used must be configured for this network If the connection is to be established to a specific SIWAREX module its IP address must be set in SIWATOOL The setting is made in menu item Communication Define Network Settings If the IP address of a SIWAREX module is unknown it can be d...

Page 51: ...which is unique worldwide The IP address can be determined from the identified MAC address The Primary Setup Tool also allows the IP address of a SIWAREX module to be set changed Additional information on the Primary Setup Tool can be found in the associated manual 7 5 4 4 Setting up a network Several SIWAREX modules can be connected together in a network via a switch Via the network you can use S...

Page 52: ...rocedure for handling parameters The current parameters in the SIWAREX module are displayed in the right hand window while the parameter values on the PC are displayed in the left hand window The new parameter value is entered first in the left hand window If several parameters of the data record are to be changed they are entered consecutively The data record is subsequently selected in the tree ...

Page 53: ... interfere with or prevent the transfer of data per TFTP protocol In such cases the respective protective mechanism must be temporarily deactivated for the duration of the update or an alternative PC used The latest firmware version can be found at Siemens Industry Online Support https support industry siemens com cs document 109476228 Note After transfer of the new firmware the parameters of the ...

Page 54: ...extent with the old firmware version and the new firmware is flashed in the background For this reason you must not switch off the module during the firmware transfer 1 Set the SIMATIC CPU to STOP 2 Register with SIWATOOL on the SIWAREX module 3 Call the firmware download using the function key 4 Select the current firmware file under Firmware Download 5 Click the Start transfer button Following t...

Page 55: ...th SIWATOOL 7 5 9 Reading out the saved scale logs The scale logs are saved powerfail proof in the internal memory of the SIWAREX You can read the logs with SIWATOOL using the Logs button A new window is opened and all logs present in the weighing module are read out using Refresh You can subsequently save these in EXCEL or csv format ...

Page 56: ...Commissioning 7 5 Service with the SIWATOOL program SIWAREX WP251 56 Manual 12 2015 A5E37203357A ...

Page 57: ... scale or removes it from the scale filling or removal mode SIWAREX WP251 can also empty the scale if required An emptying signal is then switched This signal is either switched based on a fixed time emptying time or when Limit 3 emptying limit is fallen below After emptying the next dosing is started directly continuous mode or WP251 waits for the next start command Emptying can optionally be swi...

Page 58: ...on a platform weighing machine for example and an entry is made in the log memory of the WP251 by an operator command In NAWI mode WP251 also allows a set point to be set which the dosing functionality of the module then automatically doses Logging of the dosed weight must be initiated by an operator command and is not an integral component of the automatic weighing cycle The dosing signals Coarse...

Page 59: ...a result of this the dosed weight is logged and the weighing operation is concluded In practice the execution of dosing in NAWI Removal mode can be as follows 1 Scale is filled with sufficient material 2 PLC sends set point DR 20 and material parameters DR 23 to WP251 3 PLC sends Start command e g 1101 to WP251 4 WP251 tares based on setting in DR 25 5 Coarse fine dosing phase starts 6 If configur...

Page 60: ...t is automatically checked and logged weighing step 4 7 Scale is emptied if necessary based on setting in DR 25 weighing step 5 8 WP251 jumps to weighing step 0 and waits for further commands or jumps directly back to step 1 continuous operation 8 2 5 Operating mode AWI automatic catchweighing instrument Filling In ACI mode WP251 allows a set point to be set which is then dosed automatically by th...

Page 61: ...the product to be weighed is dosed from the scale for example a silo on load cells with discharge valves In this case the full scale is tared and the net weight increases with decreasing gross weight The Dosing start parameter in DR 25 should be set to Tare for correct operation Dosing in continuous operation is possible Here is the basic sequence of dosing in ACI Removal mode 1 Scale is filled wi...

Page 62: ...TIC DB or Modbus Master Perform the calibration of the scale zero point and calibration point 1 optionally calibration point 2 Read DR 3 from SIWAREX in SIWATOOL SIMATIC DB or ModbusMaster Table 8 1 Assignment of data record 3 Parameter Description Format Length bytes De fault Min Max Write protec tion Modbus holding register Data record number Contains no of the data record USHORT 2 3 1000 Length...

Page 63: ...Calibration digits 0 measured Calibration digits 0 determined during calibration with cali bration weight 0 LONG 4 0 3 999 9 99 3 999 9 99 x 1024 Calibration digits 1 measured Calibration digits 1 determined during calibration with cali bration weight 1 LONG 4 2 000 000 0 3 999 9 99 x 1026 Calibration digits 2 measured Calibration digits 2 determined during calibration with cali bration weight 2 L...

Page 64: ...ve USHORT 2 0 0 6 x 1033 Maximum tare load Page 70 Range of subtractive semi automatic taring in of maximum weighing range FLOAT 4 100 0 250 x 1034 Maximum negative zero setting limit power on Page 70 Negative range of semi automatic zero setting in of maxi mum weighing range FLOAT 4 0 0 100 x 1036 Maximum positive zero setting limit power on Page 70 Positive range of semi automatic zero setting i...

Page 65: ...equency low pass filter 1 Page 74 Low pass filter limit frequency 0 Filter disabled FLOAT 4 2 0 50 x 1056 Order no low pass filter 1 Page 74 Filter order number 1 to 10 USHORT 2 4 1 4 x 1058 Depth average filter Page 74 Depth of first average filter 0 inactive USHORT 2 20 0 250 x 1059 Reserve Reserve USHORT 2 20 0 20 1060 Weighing operating mode Page 75 0 NAWI Filling 1 NAWI Removal 10 Gravimetric...

Page 66: ...d frequency Page 75 Switchover of line frequency 50 60 Hz 0 50 Hz 1 60 Hz USHORT 2 0 0 1 1085 8 3 2 Scale name You can select any name but it may not exceed 12 characters You can enter any designation Note The scale name cannot be changed after official verification 8 3 3 Unit of weight The following weight units are available for selection milligram gram kilogram metric ton ounce pound short ton ...

Page 67: ... type of load cells used and for scales requiring official calibration additionally on the scale interval and the resulting resolution of the scale For scales not requiring official calibration the maximum weighing range corresponds to the nominal load of all load cells number of cells multiplied by the nominal load of one cell minus the dead load mechanical setup The correct parameter assignment ...

Page 68: ...he supply voltage is switched on in legal trade operation this is at the end of the startup waiting time A weight of 10 of the maximum measuring range can be set to zero by power on for legal trade scales NOTICE If the scales are not being used in legal trade operation no OIML restrictions fully loaded scales can also be set to zero once this function is enabled The function can however be limited...

Page 69: ... subtractive tare the maximum tare weight is limited to 100 of the maximum weighing range In the case of additive tare the maximum tare weight is limited to 250 of the maximum weighing range The current tare value is deleted if you switch between additive and subtractive taring Note There is no automatic evaluation of whether there is sufficient load cell measuring range capacity for an additive t...

Page 70: ...upply voltage is switched on If initial zeroing zero setting at switch on of the supply voltage has been activated the effect of the function can be limited with this parameter The parameter is specified as a percentage of the Maximum weight parameter Example Maximum weight 100 kg Positive zeroing limit initial zeroing 10 Up to 10 kg 10 of 100 kg can be zeroed by the initial zeroing function 8 3 1...

Page 71: ...and positive weight for the zeroing is 4 of the maximum weighing range Example Maximum weight 100 kg Negative zeroing limit semi automatic 1 Up to 1 kg 1 of 100 kg can be set to zero by the zero setting function 8 3 21 Standstill monitoring Standstill monitoring is used to recognize when the scale is at steady state Scale standstill is established when the weight value changes by less than a speci...

Page 72: ...is made in numerical increments d 8 3 23 Standstill 1 time This parameter defines the time window in which the weight value may fluctuate within Standstill range 1 only in order to determine that standstill has occurred The setting is made in milliseconds ms 8 3 24 Max waiting time for standstill 1 The maximum waiting time for standstill 1 applies when a command is performed that is dependent on t...

Page 73: ...e that standstill has occurred The setting is made in numerical increments d 8 3 26 Standstill 2 time This parameter defines the time window in which the weight value may fluctuate within Standstill range 2 only in order to determine that standstill has occurred The setting is made in milliseconds ms 8 3 27 Settling time before standstill 2 The parameter defines a time in milliseconds ms that is a...

Page 74: ...cale s response to changes in the measured value A value of 5 Hz for example results in a relatively rapid response to a change in weight a value of 0 5 Hz makes the scale slower 8 3 29 Order no low pass filter 1 The number of the filter defines the effect of damping The values 2 4 6 8 and 10 can be set The higher the selected filter number the higher the effect 8 3 30 Depth average filter Depth a...

Page 75: ...ecureDisplay communicates directly via the Ethernet port of the WP251 or via the Ethernet port of the SIMATIC S7 1200 CPU 8 3 34 SecureDisplay version For applications requiring official calibration the SecureDisplay software is used to display the calibratable weight value The parameter defines the version of the SecureDisplay software that is running in the HMI device If the version is not enter...

Page 76: ...s loaded with a defined calibration weight e g 50 of the measuring range the calibration weight will be assigned to the new digital value from the analog to digital converter In addition the characteristic curve can be defined by a third interpolation point which must lie above point 1 Make sure that the difference between two calibration weights is at least 40 000 digits as the calibration comman...

Page 77: ...ghing module described here They are simply sent to SIWAREX by data record DR 3 and the scales are ready for use immediately The SIWATOOL program facilitates rapid calibration Following commissioning and calibration all data records must be read from the weighing module and saved as a scale file Identical scales can be put into operation immediately Connect the PC to the new scales and enable the ...

Page 78: ... scale e g 80 kg Approx 1 650 000 Lmax Nominal weight of load cell 100 kg Approx 2 000 000 Lmax 10 Rated weight approx 10 Approx 110 kg Approx 2 200 000 8 4 2 Automatic calibration Scales can be rapidly commissioned with automatic calibration The accuracy of the scale greatly depends on the entered parameters and the mechanical properties of the scale The best level of accuracy for the scale can b...

Page 79: ...t on the cells Installed load cells are evenly loaded There are no shunt circuits 8 5 DR 4 Output of calculated calibration digits 8 5 1 Overview Data record DR 4 outputs the digits calculated from the automatic scale calibration and the calibration check This data record cannot be sent to the scales Table 8 2 Assignment of data record 4 Variable Note Type Length bytes Rw Default Min Max Modbus Re...

Page 80: ...ve FLOAT 4 r 0 1212 8 5 2 Calibration digits 0 1 2 calculated The calculation is based on the parameters from DR 10 and is executed using command no 82 or 83 8 6 DR 5 Tare zero memory 8 6 1 Overview Data record DR 5 displays the current values in the tare memory and the zeroing memory In legal trade operation the data record is not write protected Table 8 3 Assignment of data record 5 Variable Not...

Page 81: ...ci fication in DR 3 Depends on speci fication in DR 3 1224 Current zero tracking weight Page 82 Current zero setting weight zero tracking FLOAT 4 rwP 0 Depends on speci fication in DR 3 Depends on speci fication in DR 3 1226 Dead load Page 82 Dead load calculat ed during automatic calibration FLOAT 4 r 0 Depends on speci fication in DR 3 Depends on speci fication in DR 3 1228 Reserve 1 Reserve SHO...

Page 82: ...ed as the zero weight The zeroing weight must be within the specified range usually 3 1 of the set zero point 8 6 6 Current zero tracking weight The current zero tracking weight is recorded in this parameter if automatic zero tracking is activated 8 6 7 Dead load The characteristic curve of the scales is determined during calibration When there is no load the main display returns 0 The dead load i...

Page 83: ...mit 2 reference the net weight specifica tion in of max weight from DR 3 2 Limit 1 and Limit 2 reference the gross weight specification as absolute weight value 3 Limit 1 and Limit 2 reference the net weight specifica tion as absolute weight value USHORT 2 rw 0 0 1 1238 Reserve 1 Reserve USHORT 2 rw 0 0 1239 Limit value 1 ON limit value 2 ON limit value 1 OFF limit value 2 OFF Page 84 Switch on po...

Page 84: ...it 3 empty Page 85 Limit empty ON always references the gross weight Unit is dependent on Limit refer ence FLOAT 4 rw 0 maxi mum num ber range maxi mum num ber range 1256 Switch on off delay limit 1 2 Switch on and switch off delay for limit 1 and 2 ms TIME 4 rw 0 0 maxi mum num ber range 1258 Reserve Reserve FLOAT 4 rw 0 1260 Reserve Reserve USHORT 2 rw 0 1262 Reserve Reserve USHORT 4 rw 0 1263 8...

Page 85: ...e configuration 8 7 3 Switch on delay limit 3 empty Switch on of Limit 3 empty can be deliberately delayed by a delay time ms This is helpful for example if the weight is undershot at the moment of opening when the scale is being emptied which would cause Limit 3 to be fallen below already 8 7 4 Limit 3 empty This parameter defines the time starting from which the scale is empty The unit is expres...

Page 86: ...odbus Register Data record number Contains no of the data record USHORT 2 r 7 1300 Length Data record length infor mation USHORT 2 r 60 1301 Application Information about which application the DR be longs to USHORT 2 r 105 1302 Version identi fier Current data record ver sion information USHORT 2 r 1 1 65635 1303 Assignment of digital input DI 0 DI 1 DI 2 DI 3 Page 90 Code 0 No command assigned 1 ...

Page 87: ... to 7 negative edge USHORT 2 rw 0 0 1999 1305 Code 0 No command assigned 1 32759 Command is triggered at a positive edge 32760 32767 Transition for steps 0 to 7 positive edge 32769 65527 Com mand command code 32768 is triggered at a negative edge 65528 65535 Transition for steps 0 to 7 negative edge USHORT 2 rw 0 0 1999 1306 Code 0 No command assigned 1 32759 Command is triggered at a positive edg...

Page 88: ...put 0 USHORT 2 rw 0 0 0xFFFF 1311 Assignment for output 3 see output 0 USHORT 2 rw 0 0 0xFFFF 1312 Response of digital outputs to faults or SIMATIC STOP Page 92 Response of digital out puts following module fault or CPU STOP 0 Outputs are switched off 1 Outputs are not switched off continue 2 The relevant substitute value is activated 3 The outputs are switched on USHORT 2 rw 0 0 0 1313 Substitute...

Page 89: ...age 93 Basis of analog value output 0 G N value 1 Gross 2 Net 3 Ext specification DR 17 4 Ext specification S7 interface USHORT 2 rw 2 0 3 1316 Response of analog output to faults or SIMATIC STOP Page 93 0 Switch off 1 Continue 2 Output configured output value 3 Output maximum value 24 mA NAMUR USHORT 2 rw 0 0 3 1317 Start value for the analog output Page 93 Value at which 0 4 mA is to be output F...

Page 90: ... Bit 10 Reserve BIT 0 rw 0 0 1 1325 6 Bit 11 Reserve BIT 0 rw 0 0 1 1325 5 Bit 12 Reserve BIT 0 rw 0 0 1 1325 4 Bit 13 Reserve BIT 0 rw 0 0 1 1325 3 Bit 14 Reserve BIT 0 rw 0 0 1 1325 2 Bit 15 Reserve BIT 1 rw 0 0 1 1325 1 Reserve 1 Reserve LONG 4 rw 0 0 1326 Reserve 2 Reserve FLOAT 4 rw 0 0 1328 8 8 2 Assignment of digital input DI 0 DI 1 DI 2 DI 3 A command trigger can be assigned to a digital i...

Page 91: ...tion code decimal Status display 0 63 0 63 Status bits of NAWI AWI Status see DR 30 64 Control of output via data record 18 65 Control of output via SIMATIC S7 I O 100 163 0 63 Status bits of NAWI AWI Status inverted see DR 30 255 default Output deactivated 1000 1015 Operating error output is set for 3 seconds 1100 1115 Operating error inverted output is reset for 3 seconds 2000 2031 Technology er...

Page 92: ...MATIC STOP The outputs are usually reset following a module fault operating error or SIMATIC CPU STOP This response is the default setting If an output is to be set following a fault this response is defined using this parameter The Response of digital outputs to fault or SIMATIC STOP parameter must also be set to Output substitute value Examples Table 8 6 Bit 0 defines digital output 0 DQ 0 Value...

Page 93: ...fied percentage from DR 25 4 Control using data record DR 17 5 Control using S7 I O s_I_O_DATA AQ_CONTROL 8 8 9 Response of analog output to faults or SIMATIC STOP This parameter defines the response of the analog output following a fault of the SIWAREX module or SIMATIC STOP Function code Response 0 default Switch off 1 Retain function 2 Output configured substitute value e g 3 5 mA 3 Output maxi...

Page 94: ...witched to unsafe state If the analog output is to be set to a given value following a fault operating error you must ensure that this poses no danger 8 8 13 Trace recording cycle The trace function is used for the continuous recording of measured values The recording rate is defined with the parameter Function code Response 1 Recording every 10 ms 10 Recording every100 ms 100 Recording every 1000...

Page 95: ...mation about which application the DR belongs to USHORT 2 r 105 1336 Version identifi er Current data record version information USHORT 2 r 1 1 65635 1337 Date and time SIMATIC DTL format DTL 12 rw DTL 197 0 01 01 00 00 00 0 1338 8 10 DR 9 module information No inputs can be made in data record DR 9 The data record contains information about the firmware and hardware versions of the module Table 8...

Page 96: ...ring header UBYTE 2 2 r 1 1 1370 OS version load er designation Operating system version CHAR 2 2 r V 1371 OS version load er designation e g version n USHORT 2 r V 1372 Reserve Reserve USHORT 2 r 0 1373 Reserve Reserve USHORT 2 r 0 1374 Reserve Reserve USHORT 2 r 0 1375 Reserve Reserve FLOAT 4 r 0 1376 8 11 DR 10 Load cell parameters 8 11 1 Overview The load cell parameters must be assigned befor...

Page 97: ... Nominal load of one load cell FLOAT 4 rw 60 0 Specifi cation from DR 3 1412 Reserve Reserve FLOAT 4 rw 0 1414 Reserve Reserve FLOAT 4 rw 0 1416 Reserve 2 Reserve SHORT 2 rw 0 1418 Reserve 3 Reserve USHORT 2 rw 0 1419 Reserve 4 Reserve FLOAT 4 rw 0 1420 Load cell manufacturer string header String header UBYTE 2 2 rw 24 24 1422 Load cell manufacturer Load cell manufacturer CHAR 24 24 rw 0 0 1423 Lo...

Page 98: ...ed weight units The parameter is required for automatic calculation of the scale characteristic curve command 82 8 12 DR 12 Ethernet parameters 8 12 1 Overview Before the SIWAREX module can be integrated into an Ethernet network the Ethernet parameters must be adapted if necessary The IP address subnet gateway and device name can be changed or adapted in DR 12 Table 8 11 Assignment of data record ...

Page 99: ...ORT 2 rw 255 0 255 1520 Subnet mask n x n n USHORT 2 rw 255 0 255 1521 Subnet mask n n x n USHORT 2 rw 255 0 255 1522 Subnet mask n n n x USHORT 2 rw 0 0 255 1523 Gateway Page 100 Gateway x n n n USHORT 2 rw 192 0 255 1524 Gateway n x n n USHORT 2 rw 168 0 255 1525 Gateway n n x n USHORT 2 rw 0 0 255 1526 Gateway n n n x USHORT 2 rw 21 0 255 1527 Device name Page 100 Current device name header UBY...

Page 100: ...pty spaces must be filled by x 8 13 DR 13 RS485 parameters 8 13 1 Overview The parameter assignment of the RS485 interface occurs in data record DR 13 If the interface is not used the default values can be retained Table 8 12 Assignment of data record 13 Variable Note Type Length bytes Rw Default Min Max Modbus registers Data record number Contains no of the data record USHORT 2 r 13 1558 Length D...

Page 101: ... 0 0 1 1564 14 Bit 3 Reserve BIT 0 rw 0 0 1 1564 13 Bit 4 Reserve BIT 0 rw 0 0 1 1564 12 Bit 5 Reserve BIT 0 rw 0 0 1 1564 11 Bit 6 Reserve BIT 0 rw 0 0 1 1564 10 Bit 7 Reserve BIT 0 rw 0 0 1 1564 9 Bit 8 Reserve BIT 0 rw 0 0 1 1564 8 Bit 9 Reserve BIT 0 rw 0 0 1 1564 7 Bit 10 Reserve BIT 0 rw 0 0 1 1564 6 Bit 11 Reserve BIT 0 rw 0 0 1 1564 5 Bit 12 Reserve BIT 0 rw 0 0 1 1564 4 Bit 13 Reserve BIT...

Page 102: ...ERT display 8 13 3 RS485 baud rate This parameter defines the baud rate for the RS485 interface Function code Baud rate 0 1 200 bps 1 2 400 bps 2 9 600 bps 3 default 19 200 bps 4 38 400 bps 5 57 600 bps 6 115 000 bps 8 13 4 RS485 character parity This parameter defines the character parity for the RS485 interface Value Character parity 0 default Even 1 Odd 8 13 5 RS485 number of data bits This par...

Page 103: ... O only or by reading writing complete data records The I O is faster in this case and exhibits a higher performance because the data is made available to the S7 1200 or SIWAREX automatically in each PLC cycle Using two user definable channels in the S7 I O process value 1 and process value 2 the user can decide which scale values see table are to be made available cyclically to the PLC in these t...

Page 104: ...3 status DI 3 8 15 DR 15 Preset tare 8 15 1 Overview This data record can be used for an external tare specification Procedure Enter the tare weight Transfer the data record to the scales Activate the preset tare weight with a command Table 8 15 Assignment of data record 15 Variable Note Type Length bytes Rw De fault Min Max Modbus registers Data record number Contains no of the data record USHORT...

Page 105: ...mode In DR 30 Process State a Simulation mode bit is available that indicates whether or not the module is currently in simulation mode Procedure Enable simulation mode in DR 3 Enter a weight value to be simulated in DR 16 Transfer DR 16 to the SIWAREX module Start the simulation using command Weight simulation on 3 Stop the simulation using command Weight simulation off 4 Table 8 16 Assignment of...

Page 106: ...dure In data record DR 7 check that Control by DR17 has been configured as the source for the analog output Check the parameter assignment of the analog output Enter a value in data record DR 17 Transfer the data record to the scales Table 8 17 Assignment of data record 17 Variable Note Type Length bytes Rw Default Min Max Modbus registers Data record number Contains no of the data record USHORT 2...

Page 107: ...e value for digital output DQ 0 DQ 1 DQ 2 DQ 3 Transfer the data record to the scales Table 8 18 Assignment of data record 18 Variable Note Type Length bytes Rw De fault Min Max Modbus registers Data record number Contains no of the data record USHORT 2 r 18 1616 Length Data record length information USHORT 2 r 12 1617 Application Information about which application the DR belongs to USHORT 2 r 10...

Page 108: ...rd 18 with this parameter This function can be used for commissioning purposes for example 8 18 3 Transitions for weighing steps 0 to 7 A set transition allows the execution of an individual weighing step to be prevented Example The transition for weighing step 2 is set Once dosing starts weighing step 1 is performed WP251 then jumps to weighing step 2 but does not execute it Status bit Step block...

Page 109: ... 2 r 20 1624 Length Data record length information USHORT 2 r 20 1625 Application Information about which application the data record belongs to USHORT 2 r 105 1626 Version identifi er Current data record version information USHORT 2 r 1 1 6563 5 1627 Single set point Page 109 Set point for a single dosing FLOAT 4 rw 50 0 0 Lim ited in DR 25 1628 Reserve Reserve FLOAT 4 rw 1630 Reserve Reserve USH...

Page 110: ...USHORT 2 r 105 1636 Version identi fier Current data record version information USHORT 2 r 1 1 65635 1637 Total set point Page 110 Total set point for continuous operation FLOAT 4 rw 0 0 1638 Reserve Reserve FLOAT 4 rw 1640 Reserve Reserve USHORT 2 rw 1642 Reserve Reserve USHORT 2 rw 1643 8 20 2 Total set point The total set point is interpreted in AWI modes as the number of containers to be dosed...

Page 111: ...TL2 with 1 kg a dosing will be rated as Good AWI Status if the weight was dosed with an accuracy of 1 kg around the specified set point If the final weight differs more than 2 kg from the specified set point the tolerance check returns Bad AWI Status The reaction of the scale to a tolerance error is also defined in DR 22 Table 8 21 Assignment of data record 22 Variable Note Data type Length bytes ...

Page 112: ... derived from OIML table Limits of error on verification Class X1 for AWI mode 3 Tolerance limits are derived from OIML table Maxi mum permissible errors in service Class X1 for AWI mode USHORT 2 rw 0 0 0 1648 Reserve Reserve USHORT 2 rw 0 0 0 1649 Tolerance limit TH2 Page 116 High limit tolerance band 2 outer FLOAT 4 rw 2 0 0 1650 Tolerance limit TH1 Page 116 High limit tolerance band 1 inner FLO...

Page 113: ...ted with Dosing completed 1 Weighing cycle is stopped User can use the Continue command to check the tolerance again and the cycle is then completed with Dosing completed in any case 2 Weighing cycle is stopped User can use the Continue command to check the tolerance again If there is still a tol erance error the scale goes to Stop state again This is repeated until the tolerance error is eliminat...

Page 114: ...mand to check the tolerance again If there is still a tol erance error the scale goes to Stop state again This is repeated until the tolerance error is eliminated e g by manually adding or removing material 3 Post dosing with continuous fine signal 4 Post dosing with pulsing USHORT 2 rw 0 0 0 1660 Reserve Reserve USHORT 2 rw 0 0 0 1661 Pulse duration for pulse post dosing Page 116 Fine signal ON d...

Page 115: ...ve SHORT 2 rw 0 0 0 1670 Reserve Reserve SHORT 2 rw 0 0 1671 8 21 2 Parameter relation The parameters are used to define how the specified tolerance limits TH2 TH1 TL1 and TL2 are to be interpreted The following options are available Function code Meaning 0 default The tolerance limits are interpreted as percentages of the set point in DS 20 1 The tolerance limits are interpreted as absolute weigh...

Page 116: ...rameter defines the limit of the first tolerance band below the set point The setting conforms to the selected tolerance reference percentage or absolute and must be greater than or equal to tolerance limit TL1 as a positive value 8 21 7 Behavior in case of TH1 error This parameter defines the limit of the first tolerance band below the set point The setting conforms to the selected tolerance refe...

Page 117: ... no adjustment of the shut off points by the proportional controller Every dosing that is not checked is classified as Good in the statistics and the specified set point DS 20 is used in calculating the statistics 8 21 11 Capture of weighings into statistics This parameter defines based on the tolerance evaluation which dosing results are to be included in the statistics calculation and which are ...

Page 118: ...e weight is interpret ed as of set point DR 20 de fault 1 Trailing fine weight is interpret ed as absolute weight value USHORT 2 RW 0 0 1 1676 Reserve Reserve USHORT 2 RW 1677 Fine weight Page 119 Material quantity that is to be dosed in fine flow FLOAT 4 RW 20 0 1678 Trailing weight Page 119 Material quantity that still runs after shut off of the fine flow FLOAT 2 RW 5 0 1680 Blocking time coarse...

Page 119: ...e Set point DR 20 100 kg Function code for parameter relation DR 23 0 Fine value DR 23 20 As a result of this setting 20 kg 20 of 100 kg is dosed with fine flow only 8 22 4 Trailing weight The parameter defines how much material still flows onto the scale after the fine signal is shut off Depending on the selected unit reference DR 23 the value must be interpreted as a percentage of the set point ...

Page 120: ...s long as the timer is active WP251 does not perform a check to determine whether the coarse shut off point has been reached At the start of dosing the coarse and fine dosing signals are usually set simultaneously The material may strike the scale hard producing an overshoot that is higher than the coarse shut off point which would cause the coarse signal to be shut off too early To prevent this p...

Page 121: ...ight unit 8 23 DR 24 Controller and filter parameters 8 23 1 Overview The parameters of the proportional controller and other filter parameters are defined in this data record Table 8 23 Assignment of data record 24 Variable Note Type Length bytes RW De fault Min Max Modbus registers Data record number Contains no of the data record USHORT 2 r 24 1694 Length Data record length information USHORT 2...

Page 122: ... Selection for dosing filter Page 124 0 Process values and dosing ac cording to filter F1 1 Process values according to Filter 1 dosing according to Filter 2 USHORT 2 rw 0 0 0 1711 Frequency low pass filter 2 Page 125 Limit frequency for low pass filter 2 FLOAT 4 rw 2 1712 Order no low pass filter 2 Page 125 Order number for low pass filter 2 USHORT 2 rw 4 1714 DepthDepth average filter Page 126 D...

Page 123: ...vailable for optimization of the shut off points Function code Meaning 0 No controller 1 default Proportional controller is activated Note Stop weighing cycle If a weighing cycle has been stopped by a Stop command in the meantime there is no corrective action by the controller for this dosing The controller becomes active only for completed and checked cycles 8 23 4 Control factor of proportional ...

Page 124: ...hut off points If both limits are at zero the controller corrects after each checked dosing 8 23 8 Reaction when max corrective action is exceeded This parameter defines the controller behavior when the maximum corrective action DR 24 is exceeded in a cycle The following options are available Function code Meaning 0 Control is discontinued for this cycle 1 default The controller controls with the ...

Page 125: ...Image 8 7 Step response of digital low pass filter at f 2 Hz The definition of the limit frequency is extremely important for suppression of disturbances Defining the limit frequency defines the speed of the scale s response to changes in the measured value For example a value of 5 Hz results in a relatively rapid response of the scale to a change in weight while a value of 0 5 Hz makes the scale ...

Page 126: ...e is now a change to Material B that entails different parameters the corrected fine trailing weight of Material would have to be read from DR 31 and copied to DR 23 before the change so that at the next loading of Material A the optimized values are used directly at the start To automate this copying the Adopt corrected fine trailing value to DR 23 automatically parameter can be set to YES or 1 8...

Page 127: ...29 Monitoring of the dosing time Once this time has elapsed a technology message is output 0 no message TIME 4 rw 0 0 0 1736 Reserve Reserve USHORT 2 rw 0 0 0 1738 Weighing start options Page 130 0 No zero setting taring 1 With zero setting 2 With taring 3 With preset tare weight from DR 15 4 With preset tare weight from SIMATIC I O USHORT 2 rw 2 0 0 1739 Cycle time for au tomatic zero setting Pag...

Page 128: ...60 Reserve Reserve USHORT 2 rw 0 0 0 1761 Reserve Reserve USHORT 2 rw 0 0 0 1762 Reserve Reserve USHORT 2 rw 0 0 0 1763 Reserve Reserve TIME 4 rw 0 0 0 1764 Reserve Reserve TIME 4 rw 0 0 1766 8 24 2 Maximum single set point This parameter limits the set point in DR 20 and thus defines the maximum capacity of the scale The setting must be less than or equal to the maximum weight DR 3 8 24 3 Coarse ...

Page 129: ...a minimum weight that must be tared at the start of dosing It applies only when a dosing start with taring is set in DR 25 The parameter can be used to prevent dosing from being started even though for example no empty container is on the scale In this case the minimum tare weight should correspond to the empty weight of the container to be filled 8 24 6 Maximum automatic tare weight This paramete...

Page 130: ...ng taring occurs at the latest as defined in the regulations Dependent on the maximum time setting 8 24 10 Number of weighings without automatic taring zero setting This parameter defines a number of dosing cycles that are not zeroed or tared It applies only during continuous operation The first cycle of the continuous operation is always zeroed or tared if configured for Dosing start 8 24 11 Chec...

Page 131: ...51 sets the Emptying bit which can be placed directly on one of the digital outputs until the gross weight falls below limit 3 defined in DR 6 and then resets the bit 2 Empty according to specified time WP251 sets the Emptying bit which can be placed directly on one of the digital outputs based on the emptying time specified in DR 25 and then resets the bit automatically regardless of whether or n...

Page 132: ...105 1770 Version identifier Current data record version information USHORT 2 r 1 1 65535 1771 String 1 string header Maximum length and actual length of string UBYTE 2 rw 16 16 0 0 1772 String 1 String 1 for logging CHAR 16 rw 0 0 0 1773 String 2 string header Maximum length and actual length of string UBYTE 2 rw 16 16 0 0 1781 String 2 String 2 for logging CHAR 16 rw 0 0 0 1782 String 3 string he...

Page 133: ...ers Data record number Contains no of the data record USHOR T 2 r 29 1812 Length Data record length information USHOR T 2 r 16 1813 Application Information on application to which DR belongs USHOR T 2 r 105 1814 Version identifier Current data record version information USHOR T 2 r 1 1 65535 1815 2000 Technological error At least one technology error exists group error B16_0 0 rw 1 0 1 1816 2001 T...

Page 134: ...patible B16_13 0 rw 1 0 1 1816 2107 Stop after toler ance error Weighing cycle stopped after tolerance error based on pa rameter assignment B16_14 0 rw 1 0 1 1816 Reserved B16_15 1 rw 1 0 1 1816 2109 Blocking time coarse error Blocking time coarse signal After expiration of the blocking time coarse signal the coarse shut off point was already ex ceeded B17_0 0 rw 1 0 1 1817 2110 Blocking time fine...

Page 135: ...7_13 0 rw 1 0 1 1817 2098 Standard param eters loaded Note for the user that the standard parameters were loaded B17_14 0 rw 1 0 1 1817 2099 Factory settings loaded Note for the user that the facto ry settings were loaded B17_15 1 rw 1 0 1 1817 Reserve Reserve FLOAT 4 rw 0 0 1818 8 27 DR 30 Process state 8 27 1 Overview This data record contains all weight values and related status information of ...

Page 136: ...increments B16_1 0 r 0 3004 Tared Set when tare weight is active B16_2 0 r 0 3004 Preset tare active Set when preset tare weight is active B16_3 0 r 0 3004 Reserve Reserve B16_4 0 r 0 3004 Waiting for standstill 1 Set when module is waiting for standstill to execute command B16_5 0 r 0 3004 Standstill 1 Set when standstill condi tion 1 is met B16_6 0 r 0 3004 Reserve Reserve B16_7 1 r 0 3004 Empty...

Page 137: ... Startup has taken place or factory settings have been loaded is deleted again after 5 seconds B16_14 0 r 0 3005 Error Error is present operating error B16_15 1 r 0 3005 AWI Status Weighing step 0 Dosing is in step 0 B16_0 0 r 0 3006 Weighing step 1 Dosing is in step 1 B16_1 0 r 0 3006 Weighing step 2 Dosing is in step 2 B16_2 0 r 0 3006 Weighing step 3 Dosing is in step 3 B16_3 0 r 0 3006 Weighin...

Page 138: ...till 2 Set when scale is within standstill range 2 B16_8 0 r 0 3007 Waiting for standstill 2 Waiting for standstill 2 for check B16_9 0 r 0 3007 Settling time running before standstill 2 Settling time running before standstill 2 B16_10 0 r 0 3007 Check follows Current dosing will be checked B16_11 0 r 0 3007 Blocking time active Blocking set point actual value comparison is running no shut off of ...

Page 139: ...r 2 Page 140 Sum 1 DOUBLE 8 r 0 3030 Totalizer 1 and Total izer 2 Page 140 Sum 2 FLOAT 4 r 0 3034 Youngest protocol ID Page 141 Newest protocol ID ULONG 4 r 0 3036 Refresh counter Page 140 Refresh counter increment ed by 1 when weight values were changed USHORT 2 r 0 3038 Date time Page 141 Year count USHORT 2 rw 1 3039 Date time Page 141 Month USHORT 2 rw 1 1 12 3040 Date time Page 141 Day in mon...

Page 140: ...cording to the settings in data record 24 8 27 6 Refresh counter Measured values are re calculated every 10 ms in the SIWAREX module The refresh counter is also incremented by 1 each time When the counter reaches the value 65536 it is reset The counter can be used as a time stamp for data record DR 30 8 27 7 Actual weight of last dosing This parameter shows the last dosed net weight 8 27 8 Totaliz...

Page 141: ...ing steps Page 58 8 28 DR 31 Process state extended 8 28 1 Overview Current states and process values of the scale can be monitored using the extended process states This data is not required for standard operation of the scale The monitoring of selected data during trial operation is extremely useful as it helps you to optimize parameters and locate errors Table 8 28 Assignment of data record 31 ...

Page 142: ...rent status of input 2 B16_2 0 r 0 3314 Current status digital input DI 0 DI 1 DI 2 and DI 3 Page 144 Current status of input 3 B16_3 0 r 0 3314 Reserve Reserve B16_4 0 r 0 3314 Reserve Reserve B16_5 0 r 0 3314 DIP switch 1 and 2 Page 144 Set when switch 1 is closed B16_6 0 r 0 3314 DIP switch 1 and 2 Page 144 Set when switch 2 is closed B16_7 1 r 0 3314 Current status digital output DQ 0 DQ 1 DQ ...

Page 143: ...2 absolute weight value FLOAT 4 r 0 0 65535 3330 Tolerance limits TH2 TH1 TL1 and TL2 Page 145 High limit tolerance band 1 absolute weight value FLOAT 4 r 0 0 65535 3332 Tolerance limits TH2 TH1 TL1 and TL2 Page 145 Low limit tolerance band 1 absolute weight value FLOAT 4 r 0 0 65535 3334 Tolerance limits TH2 TH1 TL1 and TL2 Page 145 Low limit tolerance band 2 absolute weight value FLOAT 4 r 0 0 6...

Page 144: ...14 as process value in the SIMATIC I O so that cyclic reading of DR 31 is not necessary 8 28 8 DIP switch 1 and 2 Current status of DIP switch 1 without function and 2 stand alone operation The DIP switches are located inside the housing next to the Ethernet port of WP251 8 28 9 Current status digital output DQ 0 DQ 1 DQ 2 and DQ 3 Current status of digital outputs DQ 0 to DQ 3 Note This parameter...

Page 145: ...roller 8 28 14 Tolerance limits TH2 TH1 TL1 and TL2 The tolerance limits specified in DR 22 are always output in DR 31 in the weight unit because different options are available in DR 22 for specifying the tolerance limits absolute values relative values or according to OIML R 61 8 29 DR 32 Error messages 8 29 1 Overview Data record DR 32 is used for Modbus communication with a Modbus master in or...

Page 146: ...03 Checksum error pa rameters Checksum error in parameters Bit_3 0 r 0 3504 1004 Checksum error pro gram Checksum error in program code Bit_4 0 r 0 3504 Reserve Reserve Bit_5 0 r 0 3504 1006 Log book Log book is full or defective Bit_6 0 r 0 3504 1007 Application error Wrong application loaded Bit_7 1 r 0 3504 1102 ADC error Analog to digital converter error Bit_8 0 r 0 3504 Reserve Reserve Bit_9 ...

Page 147: ...l The set point for the dosing is too small in the current configuration Bit_12 0 r 0 3505 2106 Error fine weight Trailing weight shut off correction value and set point are not com patible Bit_13 0 r 0 3505 2107 Stop after tolerance error Weighing cycle stopped after tolerance error based on parame ter assignment Bit_14 0 r 0 3505 Reserve Reserve Bit_15 1 r 0 3505 2109 Blocking time coarse error ...

Page 148: ...and Issued command code is un known Bit_1 0 0 3507 6051 Command not possi ble now See Additional information for more information Bit_2 0 r 0 3507 6052 Service command error See Additional information for more information Bit_3 0 r 0 3507 6053 Calibration command error All calibration commands Bit_4 0 r 0 3507 6054 Scale command error See Additional information for more information Bit_5 0 r 0 350...

Page 149: ...sing sys tem parameters DR 22 DR 23 See Additional information for more information Bit_4 0 r 0 3508 7063 Parameter error DR 24 See Additional information for more information Bit_5 0 r 0 3508 7064 Parameter error DR 25 See Additional information for more information Bit_6 0 r 0 3508 Reserve Reserve Bit_7 1 r 0 3508 Reserve Reserve Bit_8 0 r 0 3508 7067 Parameter error DR 28 See Additional informa...

Page 150: ...SecureDisplay software must be used in order to represent the weight and additional information in a calibratable manner The corresponding registers are always currently available at the Modbus end For operation with a SIMATIC CPU DR 34 must be read or requested by WP251 via a command Table 8 30 Assignment of data record 34 Variable Note Type Length bytes Rw Default Min Max Modbus regis ters Data ...

Page 151: ...r a scale requiring official calibration in which SecureDisplay communicates with WP251 via the CPU data record 35 provides the coded weight value In this case it must be ensured that the data record is read from SIWAREX to the CPU in a fixed time grid OB 35 using command code 2035 If this is not the case SecureDisplay remains in StartUp state For applications not requiring official calibration DR...

Page 152: ... 4052 Application Information about which application the DR belongs to USHORT 2 r 105 4053 Version identifi er Current data rec ord version infor mation USHORT 2 r 1 1 65635 4054 Min max pointer Gross weight min max pointer FLOAT 4 r 0 4055 Date and time Date and time DTL 12 r 4057 Reserve Reserve USHORT 2 r 4063 Reserve Reserve USHORT 2 r 4064 Reserve Reserve FLOAT 4 r 4065 Reserve Reserve FLOAT...

Page 153: ...weighings below TL2 ULONG 4 r 0 0 4085 No of checks class bad absolute Number of checked weighings outside tolerance band 2 ULONG 4 r 0 0 4087 No of checks class TH2 of no of weighings Number of checked weighings above TH2 as a percentage of the total number of weighings FLOAT 4 r 0 0 100 4089 No of checks class TH1 of no of weighings Number of checked weighings above TH1 as a percentage of the to...

Page 154: ...s FLOAT 4 r 0 4109 Performance per hour Performance refer enced to last dosing weight unit hour FLOAT 4 r 0 4111 No of weighings per hour Dosings per hour based on duration of last dosing USHORT 2 r 0 4113 Reserve Reserve USHORT 2 r 0 4114 Reserve Reserve FLOAT 4 r 0 4115 Reserve Reserve FLOAT 4 r 0 4117 Reserve Reserve FLOAT 4 r 0 4119 Reserve Reserve FLOAT 4 r 0 4121 8 34 DR 41 42 Data memory Da...

Page 155: ... Freely available data area UBYTE 64 64 r 0 4204 8 35 DR 45 Protocol request 8 35 1 Overview A total of 550 000 weighing logs can be saved in a calibratable manner in the internal memory of the SIWAREX If necessary a log can be read in a calibratable manner using the calibratable SecureDisplay display software and its contents checked Data records DR 45 DR 46 can be used to read any log to SIMATIC...

Page 156: ...of the requested log entry as decimal value ULONG 4 rw 0 1 4312 Reserve Reserve USHORT 2 rw 0 4314 8 35 2 Protocol ID to be read The protocol ID of the log to be displayed in data record 46 is entered here The protocol ID to be read is also used for the calibratable reading of the log via SecureDisplay For example if ID 129 is to be displayed the value 129 must be entered in DR45 and sent to SIWAR...

Page 157: ...967 295 4320 Newest report ID Page 158 ID of last saved protocol entry 0 No entry availa ble ULONG 4 r 0 1 4 294 967 295 4322 Selected protocol ID Page 158 ID of subsequent log entry 0 No entry availa ble ULONG 4 r 0 1 4 294 967 295 4324 Reserve Reserve UBYTE 2 2 r 12 12 4326 Reserve Reserve CHAR 12 12 r 0 1 4294967295 4327 Reserve Reserve UBYTE 2 2 r 12 12 4333 Reserve Reserve CHAR 12 12 r 0 1 42...

Page 158: ... 4 r 4386 Reserve Reserve USHORT 2 r 0 4388 Reserve Reserve FLOAT 4 r 0 4390 8 36 2 Oldest report ID The ID of the first saved log is displayed here 8 36 3 Newest report ID The ID of the last saved log is displayed here 8 36 4 Selected protocol ID The ID of the log requested in data record 45 and shown in data record 46 is displayed here 8 36 5 Protocol The 46 bytes of the log have the following s...

Page 159: ...bratable reading of the logbook is carried out using the SecureDisplay Table 8 38 Assignment of data record 47 Tag Comments Type Length bytes Rw De fault Min Max Modbus register Data record number Contains no of the data record USHORT 2 r 47 4392 Length Data record length infor mation USHORT 2 r 72 4393 Application Information about which application the data record belongs to USHORT 2 r 105 4394 ...

Page 160: ...me can be set and read using data record DR 48 The clock is buffered with a capacitor and can continue operating for up to approximately 70 hours without supply voltage If you are not using the Modbus protocol data record DR 8 is used for the date and time because it has the SIMATIC DTL format directly Table 8 39 Assignment of data record 48 Variable Note Type Length bytes Rw Default Min Max Modbu...

Page 161: ...date and time 2 for Modbus SIWAREX WP251 Manual 12 2015 A5E37203357A 161 Variable Note Type Length bytes Rw Default Min Max Modbus registers Millisecond Millisecond USHORT 2 rw 0 0 999 4510 Day of the week Day of the week USHORT 2 rw 1 1 7 4511 ...

Page 162: ...Scale parameters and functions 8 38 DR 48 date and time 2 for Modbus SIWAREX WP251 162 Manual 12 2015 A5E37203357A ...

Page 163: ...WP251 outputs additional information for the error This includes further details about the error and is described in detail in the error list in this section Technology messages Technology messages occur spontaneously due to the process flow of a weighing dosing Messages provide information to the operator and have no further effect on the dosing operation 9 2 Message paths You can read out the me...

Page 164: ...elp of SIWATOOL menu item Read out all data records and saved together with the scale parameters This facilitates the detection analysis and correction of errors in the system The only way to completely clear the message buffer is with the Load factory settings command 9 5 Evaluating errors messages using Modbus Data record DR 32 is available for detecting and evaluating errors messages using Modb...

Page 165: ...ring of the load cell s If wiring is correct check the input and output resistance of the cells and identify any defective cells 1106 Underload at SIG 1106 The minimum SIG input signal of the AD converter is fallen below by more than 10 corresponds to 21 34 mV Check the wiring of the load cell s If wiring is correct check the input and output resistance of the cells and iden tify any defective cel...

Page 166: ...cti vates dosing elements if necessary despite the stopped SIMATIC CPU 2105 Set point too small 2105 The currently specified set point is too small Remedy Check the set point setting in DR 20 2106 Error fine weight 2106 Trailing weight DR 23 and set point DR 20 are incompatible Check the two entries 2107 Stop after tolerance error 2107 The weighing cycle was stopped due to a tolerance error accord...

Page 167: ... factory settings were successfully loaded 9 6 3 Data and command errors Table 9 2 Data and command errors Data and command errors Error code Additional string Description 5000 Data command errors 5000 Group error at least one data operating error present 6050 Unknown command 6050 Issued command code is unknown Check the command code 6051 Command not possi ble now 6051 The desired command could no...

Page 168: ...because a fault is present 4501 because no standstill occurred 4502 because module is already waiting for standstill 4530 because weight is outside the permissible tare weight range 4531 because weight is outside the permissible zero setting range 6055 Weighing command error 6055 Command from the Weighing commands group Start single weighing Start continuous mode etc could not be executed Addition...

Page 169: ...ion active 3519 because password incorrect 7052 Parameter is write protected and cannot be changed 7052 A parameter input is currently not possible due to active write protection Additional information contains details about the pa rameter involved Parameter ID Parameter ID of the parameter involved 7053 Error in calibration parameter DR 3 7053 Additional information indicates an implausible param...

Page 170: ... 8 DR 48 7057 Additional information indicates an implausible parameter in DR 8 DR 48 Parameter ID Parameter ID of the affected parameter in DR 8 DR 48 7058 Parameter error in DR 10 7058 Additional information indicates an implausible parameter in DR 10 Parameter ID Parameter ID of the affected parameter in DR 10 4510 because service mode is not active 7059 Error in interface parameters DR 12 DR 1...

Page 171: ...R 23 7063 Parameter error DR 24 7063 Additional information indicates an implausible parameter in DR 24 Parameter ID Parameter ID of the affected parameter in DR 24 7064 Parameter error DR 25 7064 Additional information indicates an implausible parameter in DR 25 Parameter ID Parameter ID of the affected parameter in DR 25 4507 because dosing active Reserve Reserve 7067 Parameter error DR 28 7067 ...

Page 172: ... Parameter ID Standstill 1 range 3 2153 Standstill 2 range 3 2154 Standstill 1 time 3 2158 Standstill 2 time 3 2159 Weighing operating mode 3 2503 Automatic zero tracking 3 3063 Calibration digits 0 measured 3 3081 Calibration digits 1 measured 3 3083 Calibration digits 2 measured 3 3085 Calibration weight 0 3 3086 Calibration weight 1 3 3087 Calibration weight 2 3 3088 Depth average filter 3 3137...

Page 173: ...3134 Limit 3 empty 6 3150 Limit 1 OFF value 6 3202 Limit 1 ON value 6 3203 Limit 2 OFF value 6 3205 Limit 2 ON value 6 3206 Limit reference 6 3433 Value for analog output on error or CPU Stop 7 3049 Assignment digital Input DI 0 7 3055 Assignment digital Input DI 1 7 3056 Assignment digital Input DI 2 7 3057 Assignment digital Input DI 3 7 3058 Assignment digital output DQ 0 7 3059 Assignment digi...

Page 174: ...241 Decimal point remote display 13 3126 Modbus address RTU RS485 13 3221 RS485 baud rate 13 3250 RS485 data bits 13 3251 RS485 parity 13 3252 RS485 protocol 13 3253 RS485 stop bits 13 3254 RS 485 delay 13 3895 Selection process value 1 for SIMATIC interface 14 3264 Selection process value 2 for SIMATIC interface 14 3265 Preset tare 15 3897 Preset weight 16 3808 Preset analog output 17 3127 Preset...

Page 175: ...nal controller 24 1809 Controller deadband lower limit 24 1813 Controller deadband upper limit 24 1814 Maximum corrective action 24 1819 Controller behaviour in case of exceeding max correc tive action 24 1824 Depth average filter 24 3137 Frequency low pass filter 2 24 3176 Order no low pass filter 2 24 3237 Selection for dosing filter 24 3916 Parameter relation 24 4071 Check stop points 25 524 Au...

Page 176: ...and messages 9 6 Operating errors SIWAREX WP251 176 Manual 12 2015 A5E37203357A Parameter Data record Parameter ID String 2 28 424 String 3 28 426 String 4 28 428 Sting selection for automatic logging 28 2306 ...

Page 177: ...de is switched on LED 1 Limit 1 responded LED 23 Limit 2 responded LED 3 Limit 3 responded empty limit LED 4 Standstill status LED 5 Flashing Automatic weighing active LED 6 Outside of weighing range LED 7 Parameter input blocked write protection LED 8 Not used LED 19 LC Load cell s OK Load cell s faulty LED 10 Not used LED 11 Not used LED 12 Not used LED 13 Not used LED 14 Not used LED 15 Not use...

Page 178: ...Not used LED 5 DI 0 Digital input 0 active LED 6 DI 1 Digital input 1 active LED 7 DI 2 Digital input 2 active LED 8 DI 3 Digital input 3 active LED 9 Not used LED 10 Not used LED 11 Rx Tx RS485 communication active LED 12 Not used LED 13 DQ 0 Digital output 0 active LED 14 DQ 1 Digital output 1 active LED 15 DQ 2 Digital output 2 active LED 16 DQ 3 Digital output 3 active ...

Page 179: ...ions of the commands can be found in the following command lists Table 10 1 Table 10 1 Service commands Page 180 Table 10 2 Table 10 2 Protocol commands statistics logbook Page 181 Table 10 3 Table 10 3 Trace commands Page 181 Table 10 4 Table 10 4 Display changeover for DR 34 and SecureDisplay Page 181 Table 10 5 Table 10 5 Scale commands Page 183 Table 10 6 Table 10 6 Scale commands Page 183 See...

Page 180: ...ing command 31 P 60 Set Calibration Point 0 Calibration point 0 valid save values for calibration point 0 The current load cell signal or the currently measured digits are assigned to calibration weight 0 from DR 3 and entered as Calibration digit 0 in DR 3 P 61 Set Calibration Point 1 Calibration point 1 valid save values for calibration point 1 The current load cell signal or the currently measu...

Page 181: ...rent parameters relevant to the calibration 405 Erase protocols Delete all logs P 440 Erase log book Delete the logbook Only permitted in non calibrated state P Table 10 3 Trace commands Command code Command Description Protected 451 Trace ON Start trace recording 452 Trace OFF Stop trace recording 453 Single Trace Element Create single trace current state 454 Reset Trace Memory Delete trace memor...

Page 182: ...l 864 SecureDisplay position 4 Shows the SecureDisplay on the HMI in position 4 see DisplayCali xml 865 SecureDisplay position 5 Shows the SecureDisplay on the HMI in position 5 see DisplayCali xml 870 Smallest SecureDisplay Shows the SecureDisplay on the HMI with the small est zoom factor see DisplayCali xml 871 Display serial number Display serial number of SIWAREX WP251 in the main display and ...

Page 183: ...ode 1121 Stop weighing Current dosing cycle is stopped and the Weighing cycle stopped bit is set in the AWI Status DR 30 The Continue weighing 1141 command can be used to continue and thus complete the cycle from this status 1122 Activate check stop If check stop points have been defined see section I O interface of func tion block Page 191 these are activated by Activate check stop and the dosing...

Page 184: ...ow 1141 Continue weigh ing If a dosing cycle is in the stopped state for example before creation of a log in NAWI mode the dosing cycle can be continued using this com mand 10 3 Command groups of the SIWAREX WP251 The following commands can be triggered in the scale data block DB_SCALE in the area CMD1 to CMD3 Table 10 7 Command groups of the SIWAREX WP251 Command code Description 1 1999 The meani...

Page 185: ...he function block call Note The direct use of SIWAREX WP251 with fail safe SIMATIC S7 1200 controllers is not yet supported Table 11 1 Memory requirements of the function block FB with DS communication FB251 WP251PR Read weight and status YES Send commands YES Send parameters YES Main memory requirements in CPU 15 600 bytes n x 2 650 bytes Load memory requirements in CPU 232 000 bytes n x 62 000 b...

Page 186: ...ration Starting with TIA Portal V14 the SIWAREX WP251 is integrated in the standard hardware profile as an S7 1200 technology module For TIA Portal V13 SP1 an HSP can be downloaded for the integration Image 11 1 Configuring in the TIA Portal The module can be positioned directly next to the S7 1200 CPU using drag and drop Image 11 2 Configuring with S7 ...

Page 187: ...e I O start address and a HW ID for every SIWAREX present in the project These two parameters are relevant for calling the function block and can be obtained from the properties of the respective module Image 11 3 Start address of the module Image 11 4 Hardware identifier Diagnostic interrupts can be optionally enabled or deactivated in the module properties ...

Page 188: ... carried out cyclically in the control program Image 11 5 Block WP251PR Function block parameter Description ADDR Start address WP251 see Creating the hard ware configuration Page 186 HW_ID HW ID WP251 see Creating the hardware configuration Page 186 DB_NO Number of FB internal instance DB LIFEBIT Optional status bit can be used to monitor com munication The generated instance DB DB251 in this cas...

Page 189: ...lboxes As shown in the graphics a command mailbox always consists of a command code Int and four bits Bool A command is set by entering the desired command code in the i_CMD_CODE parameter and setting the respective command trigger bo_CMD_TRIGGER The status bits bo_CMD_InProgress command being processed bo_CMD_FinishedOk command finished without errors and bo_CMD_FinishedError command rejected or ...

Page 190: ... is possible using command code 1 see section Command lists Page 179 The variable i_CMD_CODE must therefore be assigned the value 1 and the associated bo_CMD_TRIGGER set to TRUE Subsequently the module is directly in service mode DIAG LED flashes green i_CMD_CODE 1 bo_CMD_TRIGGER TRUE Since only complete data records can be read or written it is recommendable to now read data record 3 into the CPU...

Page 191: ...7 s_IO_DATA Parameter read Meaning AWI Status AWI Status bits according to data record 30 PROCESS_VAL_1 Process value according to setting in data record 14 in REAL format default gross net weight PROCESS_VAL_2 Process value according to setting in data record 14 in REAL format default NAWI Status bits according to data record 30 dw_PROCESS_VAL_1 Process value according to setting in data record 1...

Page 192: ...he TRANSITION_STEP_2 bit is set and a weighing is started WP251 stops the weighing cycle after performing weighing step 1 and sets the Step blocked transition bit in the AWI Status The weighing or weighing step 2 is not continued until the TRANSITION_STEP_2 bit is reset SECURE_DISPLAY_CON TROL Parameter for communication of the calibratable SecureDisplay display with the SIWAREX WP251 module The S...

Page 193: ...the electronic weighing system Write parameters Export current process values Monitor messages 11 2 2 Principle of data transmission This description is valid for communication via Modbus RTU and Modbus TCP IP The standardized MODBUS protocol is used for communication The master function is always in the connected communication partner while the SIWAREX module is always the slave Data transfer is ...

Page 194: ...ultiple Registers 16 Write multiple registers If a request of the master is answered by the SIWAREX module slave the SIWAREX module sends a response frame with or without errors In the case of a response without error message the response frame contains the received function code in the case of errors the highest bit of the function code is set This corresponds to the Modbus standard Afterwards th...

Page 195: ...pe Modbus registers CMD2_CODE Code of command to be executed USHORT 920 CMD2_TRIGGER Trigger for starting the command USHORT 921 CMD2_STATUS 0 job running 1 job finished 1 cycle USHORT 922 CMD2_QUIT 0 no error 0 error code USHORT 923 Table 11 5 Command mailbox 3 Low priority Variable Note Type Modbus registers CMD3_CODE Code of command to be executed USHORT 930 CMD3_TRIGGER Trigger for starting th...

Page 196: ...en be written The complete data record must subsequently be written internally using an appropriate command A plausibility check of the complete data record is carried out in the process Example A parameter from DR 3 is to be written First write register CMD3_CODE with 2003 2000 plus the number of the data record Then write CMD3_TRIGGER with 1 The DR 3 is then updated in the Modbus memory It is no...

Page 197: ...libration set 12 1 2 Scale design If you wish to use the scale in operation requiring verification the design must correspond to the conditions specified in the construction license Therefore you should already take the specifications of the construction license into account when configuring and designing the scale In the case of calibrated scales the responsible weights and measures office should...

Page 198: ...suring properties of the scale prior to the verification may be different A preliminary check with various calibration weights should always be carried out 12 1 6 Calibration label The calibration labels are edited based on the templates from the calibration set and subsequently printed The fields in the calibration labels can already be provided with the corresponding values prior to the verifica...

Page 199: ...tch over contents of the SecureDisplay the display switches back automatically to the weight display Display SecureDisplay version Display calibration regulation Display scale data Display SIWAREX serial number Display SIWAREX firmware release Scale check submenu Switch over contents of the SecureDisplay x 10 increased resolution 5 s Display current tare 5 s Scale commands Set to zero Tare setting...

Page 200: ...valuation electronics must agree with the requirements in the EC type approval The currently valid version can be called on the SecureDisplay Call up the main menu in the main display function key with the open end wrench Select the Calibration check submenu in the main menu Select the Version and variables check submenu in the Calibration check submenu Activate the Display SIWAREX firmware releas...

Page 201: ...truction license 6 Checking of the serial number of the evaluation electronics The serial number of the evaluation electronics used shown at top right in the SecureDisplay must agree with the ID label The serial number of the evaluation electronics used can also be called on the SecureDisplay Call up the main menu in the main display function key with the open end wrench Select the Calibration che...

Page 202: ... open end wrench Select the Calibration check submenu in the main menu Select the Scale check submenu in the Calibration check submenu Check with the Tare setting or Delete tare command 9 Checking of the parameter disabling calibration bridge The calibration bridge must be inserted on the weighing module You can check the calibration bridge using the specific symbol at the bottom right in the main...

Page 203: ...nt consumption 200 mA with 24 V DC Typical power loss of the module 4 5 W Power supply from SIMATIC S7 backplane bus Table 13 2 Technical specifications Power supply from SIMATIC S7 backplane bus Current consumption from S7 1200 backplane bus Typically 3 mA Analog load cell interface connection Table 13 3 Technical specifications Analog load cell interface connection Error limit to DIN1319 1 at 20...

Page 204: ...0 Hz noise suppression CMRR 80 dB Input resistance Signal cable typ 5 106 Ω Sensor cable typ 60 106 Ω 1 Relative accuracy Absolute accuracy is only reached by calibration on site with calibration stand ard 2 Accuracy for module replacement or theoretical calibration decisive 3 Value valid at sensor voltage drops on cables are compensated up to 5 V Analog output The set replacement value is output ...

Page 205: ...de switch Supply voltage range 19 2 V DC to 28 8 V DC Max output current per output 0 5 A ohmic load Max total current for all outputs 2 0 A Refresh rate FW 100 Switching delay typ 25 µs turn on typ 150 µs turn off RDSON 0 25 Ω Short circuit proof Yes Electrical isolation 500 V AC Cable length meter Max 500 m shielded 150 m unshielded Digital inputs DI Table 13 6 Technical specifications Digital i...

Page 206: ...ivated 390 Ω 220 Ω 390 Ω Electrical isolation 500 V AC Transfer protocol ASCII for remote display from Siebert and Mod bus RTU Cable length 115 kbps max 1 000 m fieldbus cable 2 wire shielded e g 6XV1830 0EH10 Ethernet Table 13 9 Technical specifications Ethernet Standard IEEE 802 3 Transmission rate 10 100 Mbps determined automatically Electrical isolation 1 500 V AC Transfer protocol TCP IP Modb...

Page 207: ...z 3 5 mm out 8 4 Hz 500 Hz 9 8 m s2 10 cycles per axis 1 octave min Shock load during transport IEC 60068 2 27 Test Ea 250 m s2 25G half sine Duration 6ms Quantity 1 000 each per axis in negative and positive direction Free fall IEC 61131 2 IEC 60068 2 31 Test Ec procedure 1 For devices 10 kg In product packaging 300 mm drop height In shipping package 1 0 m drop height per 5 attempts 13 2 Electric...

Page 208: ...ld and signals Additional electrical circuits Test voltage 500 V AC or 707 V DC Test duration 1 minute Short circuit current 5 mA Electromagnetic compatibility Table 13 13 Requirements Interference emission in industrial area in accordance with EN 61000 6 4 Comments Standard Limits Emission of radio interferences electromagnetic fields Class A industrial environment EN 61000 6 4 IEC CISPR 16 2 3 2...

Page 209: ...ables EN 61000 4 5 IEC 61131 2 NAMUR NE21 EN 61326 1 kV symmetrical 2 kV asymmetrical Surge on data and signal cables EN 61000 4 5 IEC 61131 2 NAMUR NE21 EN 61326 1 kV symmetrical1 2 kV asymmetrical HF irradiation amplitude modulated IEC61000 4 3 NAMUR NE21 OIML R76 EN 45501 3 80 to 2 000 MHz 12 V m Mod 80 AM with 1 kHz Note In the ranges 87 108 MHz 174 230 MHz and 470 790 MHz 3 V m HF irradiation...

Page 210: ...de IEC60721 3 3 Class 3M3 3K3 stationary use weather proofed Storage transport IEC 60721 3 2 class 2K4 without precipitation Table 13 16 Climatic requirements Comments Ambient conditions Application areas Operating temperature vertical installation in S7 1200 10 60 horizontal installa tion in S7 1200 10 40 Operation with verification capabil ity 10 40 Storage and transport temperature 40 70 C Rela...

Page 211: ...mation Use of SIWAREX modules in a Zone 2 Hazardous Area https support industry siemens com cs lc en DE Note The current approvals for SIWAREX WP251 can be found on the module rating plate CE approvals cULus approval Ex approval Manufacturer declaration in accordance with 2004 108 EC ATEX product guideline KCC approval EAC approval RCM approval RCM approval The approvals are available online at ht...

Page 212: ...Technical specifications 13 3 Approvals SIWAREX WP251 212 Manual 12 2015 A5E37203357A ...

Page 213: ...ernet patch cable CAT5 To connect the SIWAREX to a PC SIWATOOL SIMATIC CPU panel etc Digital remote display The digital remote displays can be connected directly to the SIWAREX WP251 through the RS485 interface Suitable remote display S102 RS485 Siebert Industrieelektronik GmbH PO Box 1180 D 66565 Eppelborn Germany Tel 49 0 6806 980 0 Fax 49 0 6806 980 999 Internet Siebert Industrieelektronik GmbH...

Page 214: ... I or between two JBs for fixed laying Occasional bending is possible 10 8 mm outer diameter For ambient temperature 20 to 70 C 7MH4 702 8AG Cable Li2Y 1 x 2 x 0 75 ST 2 x 2 x 0 34 ST CY blue sheath To connect junction box JB or extension box EB in hazardous area and Ex interface Ex I for fixed laying Occasional bending is possible blue PVC insulating sheath approx 10 8 mm outer diameter For ambie...

Page 215: ...ESD devices can be destroyed by voltages well below the threshold of human perception These static voltages develop when you touch a component or electrical connection of a device without having drained the static charges present on your body The electrostatic discharge current may lead to latent failure of a module that is this damage may not be significant immediately but in operation may cause ...

Page 216: ...body the workplace and packaging are grounded This prevents electrostatic charge Avoid direct contact As a general rule only touch electrostatic sensitive devices when this is unavoidable e g during maintenance work Handle the modules without touching any chip pins or PCB traces In this way the discharged energy can not affect the sensitive devices Discharge your body before you start taking any m...

Page 217: ...ort Package HW Hardware NAWI Non automatic weighing instrument NSW nicht selbsttätige Waage OIML Organisation Internationale de Metrologie Legale OP Operator Panel SIMATIC PC Personal computer pT Preset tare predefined tare weight with manual taring RAM Random access memory PLC Programmable logic controller STEP 7 Programming device software for SIMATIC S7 AWI Automatic weighing instrument T Tare ...

Page 218: ...List of abbreviations B 1 List of abbreviations SIWAREX WP251 218 Manual 12 2015 A5E37203357A ...

Page 219: ...d to calibration 57 E EMC Interferences 25 EMC requirements 25 ESD guidelines 215 F Factory setting 57 Function block 185 Functions 21 G Guidelines ESD guidelines 215 H Hotline 15 I Installation 27 Installation guideline 25 Internet 16 L Load cell connections 31 M Memory requirement 185 Message and error types 163 Modbus RTU 193 O Operating errors 164 Operating mode 57 P Parameter assignment via M...

Page 220: ...Index SIWAREX WP251 220 Manual 12 2015 A5E37203357A Shield connection element 32 SIWATOOL V7 42 Support 16 System overview 19 T Technical specifications 203 ...

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